and changes were imposed in a top-down way, if they do not meet those criteria, they will not happen. >> the prime minister will remember that this house gave the green light to stem cell research some years ago, but we now find that the eu court of justice is hindering progress by bringing into question the validity of the patents protecting research. on behalf of the millions of people in this country who suffer from long-term medical conditions, will the prime minister do what he can to clear this blockage? >> my honorable friend makes an extremely serious point. i will look closely at it, because i think this country has a competitive advantage from our having taken difficult decisions about stem cell research. it is important that we continue to lead in that area -- not only, as my honorable friend says, for economic and scientific reasons, but because we want to make sure that for people with long-term and debilitating conditions, for children with disabilities and other concerns, we crack those problems for the future.